Definition of Vitamin A test
Vitamin A is a fat-soluble vitamin. This article describes the test used to measure the amount of vitamin A in the blood.
David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc. – 11/15/2009